(Sorry. Typing English is faster for me)
Just like what Japanese people treat us.
If you apply the foreign registration card (any foreigner who stays longer or has job there) in Japan, your card will be printed "中華人民共和國台灣省"

So, don't buy Japanese goods too.

Just boycott cannot help us or make us better than them. But, of course, feel free to do it if you like.